Valve for heating systems.



.I. S. BRENNAN. VALVE FOR HEATING SYSTEMS.

APPLICATION FILED APR-27. 1914.

1,158,893. v Patented Nov. 2, 1915.

on-N s. BRENNAN, or MILWAUKEE, wIsooNsIN.

VALVE FOR HEATING SYSTEMS.

messes.

also in cornmunicationwith a vacuum con-' trolled return plpe system. By thls peculiarly constructed valve each radiator of the system is freed from and water of condensatlon, while, at the same tlme, the said valve'operatesto' close the return end of" the radiator automatically whensaid radiator has reached a predetermined high temperature due to the introduction of vapor or steam therein in the'desiredquantity. Closing of the valvethus prevents the escape of steam or vapor, whichvalve prior to its closing,- permits the escape of air and" water.

coincident to the introduction of the heating medium. Thus it will be'seen that the radiators or heat units of the entire system are eifectually controlled to produce their maxi mum heating efficiency to provide a thermo- 'static diaphragm in connection with the automatlc valve, whereby said valve 18 rendered sensitive to heat. and will thus close or open under variations of "temperaturey to provide means for adjusting the diaphragm 7 controlled valve-memberwith relation to its seat, whereby the sensitiveness of the valve is controlled; to provide spring-controlled means in opposition to the expansive force of the diaphragm, which spring-controlled means also serves as a strainer to prevent foreign substances from clogging said valve; to provide means for eliminating the noise or rattle in the automatically actuated valve.

With the above and other minor objects in View the invention consists in certain peculiarities ofconstruction and combination of parts as set forth hereinafter with reference to the accompanying drawings and subsequently claimed.

In the drawings Figure 1, an enlarged detailed sectional view of an automatic valve embodying the features of my invention, the section being indicated by line 2-2 of Fig. 2, which valve is the primary element in the Specification of Letters Patent.

Patented Nov. 2, 1915.

Application filed April 27, 1914. Serial No. 834,685.

system for effecting the desired results; Fig. 2, a plan view of the same with parts broken away and parts in section, and Fig. 3, an inverted detailed plan view of the valve-cap.

Referring by ch'aractersto the drawings with special reference to Figs. 1 to 3 inclusive, the casing of the automatic valve 13 is providedwith a receiving throat 14:, which threat is restricted by a trap-plate 14 that extends to a point adjacent to the lower wall of said throat or bottom of the valve chamber15. The valve chamber is provided with a" centrally disposed threaded discharge mouth 16, which mouth communicates with a return pipe of the system. The discharge mouth has fitted therein a valve-seat plug 17, which plug is in threaded union with the mouth and is thus arranged to be ad justed up or down relative to a valve member 18. The valve member 18, in this instance, comprises an offset hollow nib of a hollow diaphragm 20,which diaphragm is in the form of a diskthat is filled with suitable liquid, the same being highly sensitive to variations in temperature, whereby the diaphragm is expanded or contracted under the influence of 'said liquid. In order-gto add durability to the diaphragm, whereby it is prevented from collapsing under strain, I provide a' metallic spider 21, which spider is fitted therein prior to the diaphragm being completed, a hub 21 of the spider being extended into the offset valve member 18 to thus support the walls in all directions.

The working face of the valve-member or "nib'1'8, as shown, is thus rendered slightly flexible, whereby perfect seating of the valve is insured.

In order to hold the valve-member normally away from its seat, whereby the discharge mouth is, under ordinary conditions, open, I provide a coiled spring 22, which coiled spring surrounds the valve-plug and hollow nib constituting the valve member, the ends of said spring being seated against the bottom face of the valve chamber 15 and opposite wall of the diaphragm. Thus it will be observed that the diaphragm is forced upward under spring pressure and, owing to the fact, as shown, that the coiled spring is quite closely wound, the said spring serves as a screen to protect the discharge mouth from being clogged by foreign matter that may pass into the valve chamber. The valve casing is provided with a closurecap 23, which cap is formed with a series of concentric circular ribs 24 that are adapted to engage the upper wall of the diaphragm and against whlch ribs the diaphragm 1s forced in opposition to the coiled spring 22. r

I performing its functions.

From the foregoingflescription it Will be observed that, by the adjustment of the valve seat with relation to the valve member, closure of the valve due to expansion may be predeterminedly regulated, while at the same time such adjustment does not vary the tension of the valve spring. Hence the unseating tension of the same remains constant irrespective of the relative positions of said valve member and its seat.

Referring to thethermal-controlled automatic valve shown in lFig. 1, it is obvious that, owingto the arrangement of trapplate 1 t, should a small quantity of water settle in the valvechamber, the ordinary rattle or noise incidental to suction produced upon the return pipe, will be eliminated vfor thereason that the water within the valvechamber will seal the restricted throat opening to prevent gurgle. I I From the foregoing description it is ap parent that after the radiators have been either partly or wholly filled with vapor or steam, the heat entering the valve-chamber, 15 of the automatic valve, will cause the V diaphragm to expand and thus close communication between the radiator and return pipe system. Hence there is no liability under, ordinary working conditions, of

vapor entering the return pipe system, which vapor, if permitted to enter said re turn pipe system, would out off the series of radiators andcause a back pressure whereby their heating efliciency would be impaired. This automatic valve also prevents the escape of vapor to the atmosphere, whereby. economy in the system is effected. l I claim: t J a l. A thermostatically controlled valve for heating systems comprising acap-closing casing havinga receivingthroat and a dis I charge mouth constituting. a valve. seat, a diaphragm fitted into the casing having one 5 -chamber, one wallof which is distended to constitute a hollow nib in communication ,7 with the chamber, one face ofthe nib being flattened to form'a flexible valve closure, and 'einforcing means in the chamber and nib. V

In testimony that I claim "the foregoing I have hereunto set my hand at hlilwaukee in the county of Milwaukee and State of VVisconsin in the presence of two witnesses.

- JoHN s. BRENNAN.

Witnesses: V

Gno. W. .YoUNe, M. E. 'DOWNEY.

Copies of this patent may be obtained for-five cents each, by addressing the Uoinmissioner of Patents," I Washingtom'ILO. 

